Tom,
That sounds strange. I would first suggest checking all the Power
Supply to K3, and either K3 AUX DC to P3 or the Power Supply to P3 power
cables for loose connections.
A drop from 14.5 to 14.7 volts down to 12.8 volts indicates a high
resistance power cable or a bad power supply.
Measure the voltage at the power supply terminals to determine whether
it is the power supply or the cables - if the voltage stays up at the
power supply terminals, but the voltage sags at the K3 end, the cable is
to blame.
OTOH, if the voltage at the power supply terminals sags significantly,
then the power supply regulation is at fault.
Make certain all power cable connections are tight. Power cables
wrapped around the terminals are suspect (use ring terminals), as are
the power supply terminals designed to "insert the wire and flip the
lever" which may not guarantee a good tight connection.
73,
Don W3FPR
On 10/25/2019 5:44 PM, Tom Azlin W7SUA wrote:
Hi. My P3 has started turning off a few seconds to a minute after I turn
on my K3/P3 or when I then try to turn my P3 back on. I was watching and
saw no error message like low voltage. Watching also the voltmeter on my
K3 and stayed at 14.5 to 14.7 volts. dropped power supply to 14 volts
and it still shut down. Did a tune and voltage was 12.8 then back to 14
then afterwards it shut off.
Is my power supply not holding up properly?
Will dig out a spare power supply next.
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